The best leather duffel bags are one of the few pieces of luggage that actually gets better with age, developing character with every trip while making you look a little more handsome in the process. Of course, it still has to function like a great travel bag. From rugged heritage bags to sleek, refined carryalls, we've traveled with dozens of leather duffel bags over the years. The Best Leather Duffel Bags, According to GQBest Leather Duffel Bag Overall: Ghurka Cavalier II No. It nails everything that matters: great proportions, heirloom-quality construction, and it's literally the most charming bag we’ve ever had the blessing of putting our grails into.